今天在删除一个大表的列,意外被DBA重启DB后,再执行查询时,就报了ORA-12986这个错误,先来一起了解下这个错误:ORA-12986: col
今天在删除一个大表的列,意外被DBA重启DB后,再执行查询时,就报了ORA-12986这个错误,先来一起了解下这个错误:
ORA-12986: columns in partially dropped state. Submit ALTER TABLE DROP COLUMNS CONTINUE
Cause: An attempt was made to access a table with columns in partially dropped state (i.e., drop column operation was interrupted).
Action: Submit ALTER TABLE DROP COLUMNS CONTINUE to complete the drop column operation before accessing the table.
可以看到导致这个错误的原因是因为你正在删除列,但是删除到一半时,,进程被意外终止了,导致表处在部分删除状态,所以报了咋么个错误,你要做的就是继续删除,看下下面的例子:
1.将列置为unused
ALTER TABLE test1 SET UNUSED COLUMN Tablespace_name;
2.删除unused列
ALTER TABLE test1 DROP UNUSED COLUMN CHECKPOINT 5;
在未执行完毕前,用 shutdown abort强制关闭数据库(如果用shutdown immediate就看不到效果,它会等到执行完毕才会关闭数据库)
3.重新启动数据库,查看test1表,报错
4.继续删除未删完的列
ALTER TABLE test1 DROP COLUMNS continue
5.执行完毕后再次查询test1表,就OK了
相关阅读:
ORA-01172、ORA-01151错误处理
ORA-00600 [2662]错误解决
ORA-01078 和 LRM-00109 报错解决方法
ORA-00471 处理方法笔记
ORA-00314,redolog 损坏,或丢失处理方法
ORA-00257 归档日志过大导致无法存储的解决办法

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